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CicloSport Hac4 Woes(6 posts)

CicloSport Hac4 Woescipolini2b
Sep 27, 2003 6:25 PM

About 3/4 of the way through todays ride, my hac 4 just blanked out on me. The unit stopped transmitting heart rate about a month ago, even after I changed the battery in the heart rate transmiter. I understand that it is possibly a battery problem. There is a battery on the mounting bracket, chest strap, and magnet sensor. However, how am I supposed to change the battery in the head unit? Should I unscrew the tiny tiny phillips screws underneath it? Can someone share what happened to theirs the first time the battery ran out? Did it stop transmitting heart rate, then a month later completely turn off? Any help would be appreciated.
re: CicloSport Hac4 Woesgray8110
Sep 27, 2003 7:31 PM
When the battery in the head unit goes dead, you need to remove the screws on the back and access the battery - it's a bit tricky - but I have done it with no probems. If you are nervous about it, bring it into a watch repair place or a battery store and they will do it.

When the battery went dead for me, I had two symptoms: for about a week the transmission between the speed sensor & the head unit became erratic and then the screen blanked out. It was a bit odd when it did this. The display did a slow fade from top to bottom and then was completely blank and nothing happened.
Sep 28, 2003 8:57 AM
The unit was on when I woke up this morning, and giving out speed reading even though it wasn't connected to the handlebar mount...I'll change the battery like you described. Thanks.
How long did the batteries last?torquecal
Sep 28, 2003 2:01 PM
Just curious, I've had one for about 4 months now.
How long did the batteries last?cipolini2b
Sep 28, 2003 4:58 PM
I bought mine in june. So about four months as well...i expected them to last longer.
Sep 28, 2003 5:37 PM
mine haven't shown any sign of failure yet, but after reading this I'll keep my eyes open.